Blaze CSS is described as 'Open source modular CSS framework providing great structure for building websites quickly' and is an app in the Development category. There are more than 25 alternatives to Blaze CSS for a variety of platforms, including Online / Web-based, Self-Hosted solutions, Mac, Windows and Linux. The best alternative is Bootstrap, which is both free and Open Source. Other great apps like Blaze CSS are Materialize (Free, Open Source), Foundation (Free, Open Source), Purecss (Free, Open Source) and Tailwind CSS (Free, Open Source).
Shoelace.css is a starter kit and not a framework. Customizable through CSS variables, it doesn’t require Less, Sass, or any preprocessing at all. The minified version is only 35.3KB and much smaller when gzipped.